Ventilating system

ABSTRACT

A compact ventilating system having an air purifying function is disclosed, which includes a case having one end buried in a ceiling of a room, and the other end projected toward the inside of the room; an air-supplying passage of communicating the outside of the room, the case, and the inside of the room with one another, to supply an outdoor air to the inside of the room; an air-discharging passage of communicating the inside of the room, the case, and the outside of the room with one another, to discharge an indoor air to the outside of the room; an air-circulating passage of communicating the inside of the room with one point of the air-supplying passage inside the case, to introduce the indoor air to the case, and to re-supply the air to the inside of the room; and a fan provided in the case, for supplying the outdoor air introduced to the case through the air-supplying passage to the inside of the room, or re-supplying the indoor air introduced to the case through the air-circulating passage to the inside of the room.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the benefit of Korean Application No.P2004-59268, filed on Jul. 28, 2004, which is hereby incorporated byreference as if fully set forth herein.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention relates to a ventilating system, and moreparticularly, to a compact ventilating system having an air purifyingfunction.

2. Discussion of the Related Art

In case many people stay in a closed room, such as an office or avehicle, the closed room is polluted with carbon dioxide, and the like,produced when the people breathe quickly, and the polluted air affectshuman bodies. Therefore, it is necessary to change the polluted room airwith outdoor fresh air, for which a ventilating system is generallyused. Such a ventilating system is installed inside a ceiling, forforced discharge of room air and introduction of outdoor air into theroom.

In order to install the ventilating system, it is necessary to obtain asufficient room for the ventilating system between a ceiling and a floorof an upper story. Accordingly, a distance between a floor of a lowerstory and a floor of an upper story, a height of one story, increases,thereby lowering the spatial efficiency and the economical efficiency ina building.

In the meantime, currently, for more comfortable room environment, anair purifier as well as the ventilating system is provided in the room,for collecting dust or microbes from the room air, thereby requiring anadditional cost for the air purifier.

Also, the air purifier is installed on a room floor, for purifying theoutdoor air introduced into the room. In this state, it is difficult toimprove the efficiency in removing the dust from the room air. Besides,in case the air purifier is installed on the room floor, infants andchildren can touch the air purifier, so that it may cause safetytroubles and damages in the air purifier.

Furthermore, since the ventilating system and the air purifier areseparately provided in the room, in case of that the outdoor airintroduced to the inside of the room is polluted, the polluted outdoorair is directly provided to the inside of the room when ventilating theroom air with the ventilating system. As a result, the polluted outdoorair is directly provided to the inside of the room, so that it isimpossible to obtain the comfortable room environment.

SUMMARY OF THE INVENTION

Accordingly, the present invention is directed to a ventilating systemthat substantially obviates one or more problems due to limitations anddisadvantages of the related art.

An object of the present invention is to provide a ventilating systemhaving a modified structure not to increase a distance between a floorof a lower story and a floor of an upper story.

Another object of the present invention is to provide a ventilatingsystem having a modified structure of purifying an outdoor air andproviding the purified air to the inside of a room when ventilating aroom air.

Additional advantages, objects, and features of the invention will beset forth in part in the description which follows and in part willbecome apparent to those having ordinary skill in the art uponexamination of the following or may be learned from practice of theinvention. The objectives and other advantages of the invention may berealized and attained by the structure particularly pointed out in thewritten description and claims hereof as well as the appended drawings.

To achieve these objects and other advantages and in accordance with thepurpose of the invention, as embodied and broadly described herein, aventilating system includes a case having one end buried in a ceiling ofa room, and the other end projected toward the inside of the room; anair-supplying passage of communicating the outside of the room, thecase, and the inside of the room with one another, to supply an outdoorair to the inside of the room; an air-discharging passage ofcommunicating the inside of the room, the case, and the outside of theroom with one another, to discharge an indoor air to the outside of theroom; an air-circulating passage of communicating the inside of the roomwith one point of the air-supplying passage inside the case, tointroduce the indoor air to the case, and to re-supply the air to theinside of the room; and a fan provided in the case, for supplying theoutdoor air introduced to the case through the air-supplying passage tothe inside of the room, or re-supplying the indoor air introduced to thecase through the air-circulating passage to the inside of the room.

At this time, the case is formed in a flat-quadrant shape, for beingpositioned at a corner of the ceiling in the room. Also, the case hastwo sides being adhered to the corner of a wall in the room. The case isformed in a flat-quadrate shape, and one side of the case is positionedadjacent to the wall of the room. In addition, the case has a roundfrontal side for supplying the indoor air or the outdoor air introducedto the inside of the case to the inside of the room.

The ventilating system further includes a louver provided in theair-circulating passage, for opening and closing the air-circulatingpassage. In the ventilating system, there is a preheat exchangerprovided at an intersection between an air-supplying duct and anair-discharging duct, for indirect heat-exchange of the outdoor airsupplied to the inside of the room and the indoor air discharged to theoutside of the room. Also, the ventilating system includes a damperprovided in the air-supplying passage, for opening and closing theair-supplying passage. In this state, the fan inhales the air at an axisdirection, and then discharges the air at a radius direction.

The air-supplying passage includes a first port provided in the side ofthe case; an air-supplying duct connected with the first port, and beingin communication with the outside of the room by penetrating the wall;and an air-discharging hole provided in the front of the case. Also, theair-discharging holes are formed at both sides adjacent to the frontside of the case. The first port is provided at a lower portion in theside of the case under the ceiling of the room. The air-supplyingpassage further includes a guide passage slantingly provided from aninner upper portion of the case to the air-discharging hole.

The air-discharging passage includes a second inlet provided on thebottom of the case; a second port provided in the side of the case; andan air-discharging duct connected with the second port and being incommunication with the outside of the room by penetrating the wall. Thesecond port is provided at a lower portion in the side of the case underthe ceiling of the room.

The air-circulating passage includes a first inlet provided on thebottom of the case; and an air-discharging hole provided in the front ofthe case. The air-discharging holes are formed at both sides adjacent tothe front side of the case.

The case includes a division plate for dividing the inner space of thecase into a lower space and an upper space, and an opening provided inthe division plate to communicate the lower space of the case with theupper space of the case, and the fan is provided to inhale the air fromthe lower space of the case and to discharge the inhaled air to theupper space of the case. Also, the case further includes an air guide,for separating the air-supplying passage from the air-dischargingpassage. The air-supplying passage and the air-discharging passage passthrough the case under the ceiling of the room by penetrating the wallof the room.

In addition, the ventilating system includes a filter member provided inthe case, for purifying the indoor air or the outdoor air introduced tothe case, wherein the filter member includes a dust-colleting filter,photo-catalyst, and active carbon, which are provided in the case. Thefilter member may be formed of an HEPA (High Efficiency ParticulateArrestor) filter which can remove particles and bacteria, larger than0.3 micron. The filter member may be formed of a ULPA (Ultra LowPenetration Absolute) filter which can remove particles and bacteria,with a size ranging 0.01˜0.1 micron.

It is to be understood that both the foregoing general description andthe following detailed description of the present invention areexemplary and explanatory and are intended to provide furtherexplanation of the invention as claimed.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings, which are included to provide a furtherunderstanding of the invention and are incorporated in and constitute apart of this application, illustrate embodiment(s) of the invention andtogether with the description serve to explain the principle of theinvention. In the drawings;

FIG. 1 is a schematic diagram of illustrating a ventilating systemaccording to the first embodiment of the present invention;

FIG. 2 is a cross sectional view along I-I′ of FIG. 1;

FIG. 3 is a perspective view of illustrating an air flow when purifyingan indoor air with a ventilating system of FIG. 1;

FIG. 4 is a perspective view of illustrating an air flow whenventilating a room with a ventilating system of FIG. 1;

FIG. 5 and FIG. 6 are perspective views of illustrating examples ofinstalling a ventilating system of FIG. 1 to the inside of a room;

FIG. 7 is a schematic diagram of illustrating a ventilating systemaccording to the second embodiment of the present invention;

FIG. 8 is a perspective view of illustrating an air flow when purifyingan indoor air with a ventilating system of FIG. 7;

FIG. 9 is a perspective view of illustrating an air flow whenventilating a room with a ventilating system of FIG. 7; and

FIG. 10 is an exemplary perspective view of illustrating a ventilatingsystem of FIG. 7 having a damper at any one discharging hole therein.

DETAILED DESCRIPTION OF THE INVENTION

Reference will now be made in detail to the preferred embodiments of thepresent invention, examples of which are illustrated in the accompanyingdrawings. Wherever possible, the same reference numbers will be usedthroughout the drawings to refer to the same or like parts.

Hereinafter, a ventilating system according to the first embodiment ofthe present invention will be described with reference to theaccompanying drawings.

FIG. 1 is a schematic diagram of illustrating a ventilating systemaccording to the first embodiment of the present invention. FIG. 2 is across sectional view along I-I′ of FIG. 1. FIG. 3 is a perspective viewof illustrating an air flow when purifying an indoor air with aventilating system of FIG. 1. FIG. 4 is a perspective view ofillustrating an air flow when ventilating a room with a ventilatingsystem of FIG. 1. FIG. 5 and FIG. 6 are perspective views ofillustrating examples of installing a ventilating system of FIG. 1 tothe inside of a room.

In a ventilating system according to the related art, a case of theventilating system is provided to a space between a ceiling and a floorof an upper story. In the meantime, a ventilating system according tothe first embodiment of the present invention has a case 100, whereinone end of the case 100 is projected toward the inside of a room, andthe other end is buried in a ceiling. More particularly, as shown inFIG. 1 and FIG. 2, the case 100 has two sides connected with each otherfor being adhered to the corner of a wall 10, and one front side beinground toward the inside of the room.

For example, the case 100 is formed at a predetermined thickness. Inthis state, as shown in FIG. 1, the case 100 has a quadrant shape formedby dividing a circular shape into four parts. The case 100 has the twosides positioned at the corner of the wall 10 for being adhered to thewall 10, an upper end being buried in the ceiling, and a lower end beingprojected toward the inside of the room.

In this way the case 100 is positioned, some of the case 100corresponding to a first height H1 (H1 of FIG. 2) is provided in a spacebetween the ceiling and the bottom of the upper story, and the remainingof the case 100 corresponding to a second height H2 (H2 of FIG. 2) isprovided in an inside space of the room under the ceiling.

Accordingly, the ventilating system according to the present inventionmay be easily installed to a building having a small distance between afloor of a lower story and a floor of an upper story, that is, a smallheight of one story. If using the ventilating system according to thepresent invention, it is possible to decrease a height of one story whenconstructing a new building.

The ventilating system according to the present invention has an airsupplying passage of providing an outdoor air to the inside of the room,an air discharging passage of discharging an indoor air to the outsideof the room, and an air circulating passage of circulating the indoorair, wherein each passage flows through the case 100.

Hereinafter, the air passages will be described in detail.

Through the air supplying passage, the outside of the room, the case100, and the inside of the room are in communication with one another.

In case of the ventilating system according to the related art, afterthe air supplying passage of providing the outdoor air to the inside ofthe room flows through the space provided between the ceiling and thefloor of the upper story, the air supplying passage is connected to thecase 100.

Meanwhile, in case of the ventilating system according to the presentinvention, the air supplying passage penetrates the wall 10 withoutpassing through the space provided between the ceiling and the floor ofthe upper story, and then the air supplying passage is directlyconnected with the side of the case 10 under the ceiling 20.

For example, the air supplying passage is comprised of a first port 101provided in side of the case 100, an air-supplying duct 300 connectedwith the first port 101, and an air-discharging hole 130 provided in thecase 100. The first port 101 is provided at any one side of the twosides of the case 100, for being positioned under the ceiling 20. Also,the air-supplying duct 300 is provided to penetrate the wall 100,wherein one end of the air-supplying duct 300 is connected with theoutside of the room, the other end of the air-supplying duct 300 isconnected with the first port 101 under the ceiling 20, and theair-discharging hole 130 is provided in the front of the case 100.

At this time, the first port 101 is provided at a lower portion in theside of the case 100, and the air-discharging hole 130 is provided at acentral portion or an upper portion in the front of the case 100 underthe ceiling 20. Also, as shown in FIG. 2, a guide passage 160 isprovided in the case 100, wherein the guide passage 160 is slantinglyprovided from the inner upper portion of the case 100 to theair-discharging hole 130. In addition, as shown in FIG. 2, aflow-direction guide 131 may be additionally provided in theair-discharging hole 130, for controlling the flow direction of the airdischarged to the inside of the room.

Accordingly, the outdoor air, introduced to a lower part of the case 100through the air-supplying duct 300, moves to an upper part of the case100, and then is discharged to the inside of the room through the guidepassage 160 and the air-discharging hole 130. At this time, the airsupplied to the inside of the room is discharged to a lower space of theroom by the guide passage 160, and the air-supplying direction isdetermined by the flow-direction guide 131. In the meantime, forexample, an air-supplying fan 320 may be provided in the air-supplyingduct 300, as shown in FIG. 1, wherein the air-supplying fan 320 suppliesthe outdoor air to the inside of the room.

Through the air discharging passage, the inside of the room, the case100, and the outside of the room are in communication with one another.

In the related art ventilating system, after the air discharging passageof discharging the indoor air to the outside of the room flows throughthe space formed between the ceiling and the floor of the upper story,the air discharging passage is connected to the case 100.

In the meantime, in case of the ventilating system according to thepresent invention, the air discharging passage penetrates the wall 10without passing through the space formed between the ceiling and thefloor of the upper story, and then the air discharging passage isdirectly connected with the case 100 under the ceiling 20.

For example, the air discharging passage is comprised of a second inlet120 provided on the bottom of the case 100, a second port 102 providedin the side of the case 100, and an air-discharging duct 400 connectedwith the second port 102 and being in communication with the outside ofthe room. At this time, as shown in FIG. 1 to FIG. 3, the second inlet120 may be formed of a plurality of slots.

For example, as shown in FIG. 1 to FIG. 3, the second inlet 120 may beformed of a plurality of slots. Also, for example, the second port 102is provided in parallel with the first port 101 at the lower portion inthe side of the case 100. Accordingly, the indoor air introduced to thecase 100 through the second inlet 120 is discharged to the outside ofthe room through the air-discharging duct 400.

In more detail, as shown in FIG. 1, the air-discharging duct 400 mayhave an additional air-discharging fan 410 for discharging theintroduced indoor air to the outside of the room. Furthermore, as shownin FIG. 1, another air-discharging fan 411 may be provided in theair-discharging duct 400, for improvement the efficiency in dischargingthe air.

Through the air circulating passage, the inside of the room is incommunication with one point of the air supplying passage inside thecase 100.

The air circulating passage introduces the indoor air to the case 100,and again supplies the introduced air to the inside of the room. Forexample, the air circulating passage is comprised of a first inlet 110provided on the bottom of the case 100, and the air-discharging hole 130provided in the front of the case 100. At this time, as shown in FIG. 1to FIG. 3, the first inlet 110 may be formed of a plurality of slots,wherein the first inlet 110 is provided in parallel with the secondinlet 120 on the bottom of the case 100.

The air circulating passage meets with the air supplying passage in thecase 100. Accordingly, the indoor air introduced to the case 100 throughthe air circulating passage and the outdoor air introduced to the case100 through the air supplying passage are supplied to the inside of theroom through the air-discharging hole 130.

In the ventilating system according to the present invention, a preheatexchanger 500 may be additionally provided at an intersection of the airsupplying passage and the air discharging passage, and morespecifically, at an intersection of the air-supplying duct 300 and theair-discharging duct 400.

The preheat exchanger 500 includes a plurality of first passages for theflow of the outdoor air, and a plurality of second passages for the flowof the indoor air, wherein the second passages are provided in-betweenthe first passages. Then, a plate is provided between each of the firstpassages and each of the second passages. As a result, the outdoor airsupplied to the inside of the room through the air-supplying duct 300 isindirectly heat-exchanged with the indoor air discharged to the outsideof the room through the air-discharging duct 400 in the preheatexchanger 500.

In the meantime, as shown in FIG. 2, a fan 210 is provided in the case100, wherein the fan 210 supplies the air introduced to the case 100through the air supplying passage or the air circulating passage to theinside of the room. The fan 210 supplies the outdoor air introduced tothe inside of the case 100 through the air-supplying duct 300 connectedwith the lower portion in the side of the case 100 to the inside of theroom. Also, the fan 210 supplies the indoor air flowing into the case100 through the first inlet 110 formed on the bottom of the case 100 tothe inside of the room, again. For example, the fan 210 may be formed ofa cross flow fan of inhaling the air at an axis direction, anddischarging the inhaled air at a radius direction. In this case, it ispossible to obtain compactness in the case 100, and to improve theefficiency in the fan 210.

As shown in FIG. 2, a division plate 150 may be provided in the case100, wherein the division plate 150 divides the inside space of the case100 into a lower space and an upper space. Also, an opening 151 isprovided in the division plate 150, for communication between the lowerspace and the upper space of the case 100. As shown in FIG. 2, the fan210 is positioned in the opening 151.

Accordingly, the air introduced to the lower space of the case 100through the first inlet 110 or the air-supplying duct 300 is provided tothe lower side of the fan 210 through the opening 151, and then isdischarged to the upper space of the case 100. After that, the airdischarged to the upper space of the case 100 moves along the guidepassage 160 inclined toward the inside of the case 100, and then the airis provided to the inside of the room through the air-discharging hole130 provided at the lower portion in the front of the case 100.

In addition, an air guide 140 may be additionally provided in the case100, for separating the air supplying passage from the air dischargingpassage. As shown in FIG. 2, for example, the air guide 140 is providedto the lower space of the case 100, for separation of the first inlet110 and the second inlet 120. Accordingly, the air guide 140 guides theair introduced to the case 100 through the air-supplying duct 300 or thefirst inlet 110 toward the air-discharging hole 130, and guides the airintroduced to the case 100 through the second inlet 120 toward theair-discharging duct 400.

Also, at least one louver 111 is provided in the air circulatingpassage, for opening and closing the air circulating passage. Forexample, as shown in FIG. 2 and FIG. 3, the louver 111 is provided foropening and closing the first inlet 110. In this case, the first inlet110 is provided with a plurality of slots, whereby the several louvers111 are provided for opening and closing the respective slots.

Also, when the outdoor air is introduced to the inside of the roomthrough the air supplying passage with the ventilating system, thelouver 111 closes the first inlet 110. In the meantime, when circulatingthe indoor air by using the air circulating passage with the ventilatingsystem, the louver 111 opens the first inlet 110.

Furthermore, a damper 310 may be provided in the air supplying passage,for opening and closing the air supplying passage. For example, as shownin FIG. 1, FIG. 3 and FIG. 4, the damper 310 is provided to open andclose the first port 101. That is, the damper 310 opens the first port101 when supplying the outdoor air to the inside of the room through theair supplying passage with the ventilating system. In the meantime, thedamper 310 closes the first port 101 when circulating the indoor air byusing the air circulating passage with the ventilating system.

Then, a filter member 600 may be provided in the case 100. For example,the filter member 600 is positioned under the fan 210, wherein thefilter member 600 purifies the outdoor air introduced to the inside ofthe case 100 through the air-supplying duct 300 and the indoor airintroduced to the inside of the case 100 through the first inlet 110.

At this time, the air purified by the filter member 600 in the case 100is provided to the room space through the air-discharging hole 130.Accordingly, when ventilating and circulating the room air with theventilating system according to the present invention, it is possible toprovide the purified clean air to the room space since the filter member600 is provided in the ventilating system.

As shown in FIG. 2, for example, the filter member 600 is provided witha dust-collecting filter 610, photo-catalyst 620, and active carbon 630.The dust-collecting filter 610 filters dust from the air, and thephoto-catalyst 620 and the active carbon 630 are carbon having a strongadsorption capability, and absorb odor from the air.

The dust-collecting filter 610 may be used of an HEPA (High EfficiencyParticulate Arrestor) filter, or an ULPA (Ultra Low PenetrationAbsolute) filter. At this time, the HEPA filter can remove particles,such as dust, bacteria, virus, and the like, larger than 0.3 micron, upto 99.97%, and the ULPA filter, having a better performance than theHEPA filter, can remove particles, such as fine dust, bacteria,dandruff, mold, pollen, radon-decay product, smoke, and the like, with asize ranging 0.1˜0.01 micron, up to 99.999%. Also, the photo-catalyst620 is one kind of catalysts, wherein catalysis is performed with lightenergy. At this time, the photo-catalyst 620 may be used of TiO₂, ZnO,CdS, ZrO₂, SnO₂, V₂O₂, or WO₃.

Referring to FIG. 5 and FIG. 6, the aforementioned ventilating systemaccording to the present invention may be installed in various positionsaccording to the structure of the building.

For example, as shown in FIG. 5, if it is convenient to provide theair-supplying duct 200 and the air-discharging duct 300 connected withthe inside of the room by penetrating the right-side wall 10, the case100 is positioned at the right-side corner of the room. Thus, theair-supplying duct 200 and the air-discharging duct 300 are connectedwith the right side of the case 100.

In the meantime, if it is convenient to provide the air-supplying duct200 and the air-discharging duct 300 connected with the inside of theroom by penetrating the left-side wall 10, the case 100 is positioned atthe left-side corner of the room. Thus, the air-supplying duct 200 andthe air-discharging duct 300 are connected with the left side of thecase 100.

The ventilating system according to the first embodiment of the presentinvention is operated as a first operation mode for circulating andpurifying the indoor air, and a second operation mode for ventilatingthe room air by introducing the outdoor air to the inside of the room.

Hereinafter, the respective operation modes of the ventilating systemaccording to the first embodiment of the present invention will bedescribed with reference to FIG. 3 and FIG. 4.

Referring to FIG. 3, on the first operation mode, the damper 310 closesthe first port 101, and the louver 111 opens the first inlet 110.Although not shown, on the first operation mode, air-discharging fans410 and 411 are not driven. Accordingly, the indoor air is notdischarged to the outside of the room through the air-discharging duct400. With operation of the fan 210 in the case 100, the polluted indoorair is introduced to the lower space of the case 100 through the firstinlet 110 formed on the bottom of the case 100.

After that, the polluted air introduced to the lower space of the case100 passes through the filter member 600 and the fan 210, and then thefiltered clean air is discharged to the upper space of the case 100. Atthis time, the filter member 600 is provided with the dust-colletingfilter 610, the photo-catalyst 620, and the active carbon 630, whichremove the foreign matters from the polluted air, thereby purifying theair. Thereafter, the purified clean air is introduced to the upper spaceof the case 100, and then is provided to the room space through theair-discharging hole 130.

During this process, the damper 310 closes the first port 101, so thatthe outdoor air is not introduced to the case 100 through theair-supplying duct 300. As a result, only the indoor air flows into thecase 100, and the indoor air is purified in the case 100. After that,the purified air is discharged to the room space. Thus, the ventilatingsystem according to the present invention continuously circulates andpurifies the indoor air.

Next, as shown in FIG. 4, on the second operation mode, the damper 310opens the first port 101, and the louver 111 closes the first inlet 110.As operating the air-supplying fan 320 inside the air-supplying duct300, and the fan 210 inside the case 100, the outdoor air flows into thelower space of the case 100 through the air-supplying duct 300 and thefirst port 101. Then, as the outdoor air provided to the lower space ofthe case 100 passes through the filter member 600, the outdoor air ispurified. After that, the purified air moves to the upper space of thecase 100, and then is provided to the room space through theair-discharging hole 130. As described above, during this process, thelouver 111 closes the first inlet 110, whereby the indoor air is notprovided to the case 100 through the first inlet 110.

In the meantime, as the air-discharging fans 410 and 411 are operated,the indoor air is supplied to the inside of the case 100 through thesecond inlet 120, and more particularly, to the lower space of the case100 through the second inlet 120. At this time, the first inlet 110 andthe second inlet 120 are separated from each other by using the airguide 140. Accordingly, the indoor air introduced to the case 100through the second inlet 120 is not mixed with the outdoor airintroduced to the case 100 through the air-supplying duct 300. Theindoor air introduced to the case 100 through the second inlet 120 isdischarged to the outside of the room through the second port 102 andthe air-discharging duct 400.

Herein, the preheat exchanger 500 indirectly heat-exchanges the outdoorair flowing through the air-supplying duct 300 with the indoor airflowing through the air-discharging duct 400. That is, when ventilatingthe room air, the outdoor air introduced to the inside of the room isheated or cooled by the indoor air discharged to the outside of theroom, and then the heated or cooled air is provided to the room space,thereby preventing the rapid change on the inside temperature of theroom space.

In the aforementioned description, the louver 111 is provided in thefirst inlet 110. However, it is not limited to this, that is, the louver111 may not be provided. In this case, when ventilating the room air,the outdoor air is provided to the case 100 through the first port 101,and the indoor air is provided to the case 100 through the first inlet110.

Accordingly, the ventilating system according to the present inventioncontinuously introduces the outdoor air to the inside of the room, andsimultaneously circulates the indoor air. In this state, the outdoor airintroduced to the inside of the room and the circulating indoor air arepurified by the filter member 600 of the case 100, and then the purifiedair is provided to the room space.

In the meantime, FIG. 7 is a schematic diagram of illustrating aventilating system according to the second embodiment of the presentinvention. FIG. 8 is a perspective view of illustrating an air flow whenpurifying an indoor air with a ventilating system of FIG. 7. FIG. 9 is aperspective view of illustrating an air flow when ventilating a roomwith a ventilating system of FIG. 7.

Hereinafter, the ventilating system according to the second embodimentof the present invention will be described with reference to FIG. 7,FIG. 8 and FIG. 9.

The ventilating system according to the second embodiment of the presentinvention is similar in structure to the ventilating system according tothe first embodiment of the present invention, so that the detailedexplanation for the structure of the ventilating system according to thesecond embodiment of the present invention will be omitted. That is, thedifferences between the first embodiment and the second embodiment willbe described in chief.

In the same way as the ventilating system according to the firstembodiment of the present invention, the ventilating system according tothe second embodiment of the present invention has a case 100, whereinan upper end of the case 100 is buried in a ceiling, and a lower end ofthe case 100 is projected toward the inside of a room.

In the ventilating system according to the first embodiment of thepresent invention, the case is formed in the flat-quadrant shape. In themeantime, in case of the ventilating system according to the secondembodiment of the present invention, the case 100 is formed in a flatquadrate shape, as shown in FIG. 8 and FIG. 9.

Also, in the ventilating system according to the first embodiment of thepresent invention, the air-discharging hole 130 is provided in the frontof the case 100, for discharging the air to the room space. However, inthe ventilating system according to the second embodiment of the presentinvention, air-discharging holes 130 are provided at both sides of thecase 100 as well as the front side of the case 100. Accordingly, in caseof the ventilating system according to the second embodiment of thepresent invention, one side of the case 100 is adhered and fixed to awall of the room, and the air is provided to the inside of the roomthrough the air-discharging holes 130 formed in the front side and theboth sides of the case 100, as shown in FIG. 8 and FIG. 9.

The ventilating system according to the second embodiment of the presentinvention may have one side being adhered and fixed to the wall of theroom, as shown in FIG. 8 and FIG. 9.

However, the ventilating system according to the second embodiment ofthe present invention may be installed at a corner of a ceiling in theroom. In this case, the two sides of the case 100 are adhered to thewall of the room, so that any one of the two air-discharging holes 130formed on the two sides adjacent to the front side of the case 100 ispositioned close to the wall of the room. Thus, the air dischargedthrough any one air-discharging hole 103 comes into collision with thewall of the room, thereby generating turbulent air and noise.

In order to prevent this problem, as shown in FIG. 10, a damper 135 isprovided to the air-discharging hole 130 adjacent to the wall, forclosing the air-discharging hole 130. Thus, the air inside the case 100is discharged to the room space through the two air-discharging holes130 of the case 100, as shown in FIG. 10.

As described above, the ventilating system according to the secondembodiment of the present invention is very similar to the ventilatingsystem according to the first embodiment of the present invention in theshape of the case 100, the position of the air-discharging holes 130,and the damper 135 provided in the air-discharging hole 130, as shown inFIG. 7 to FIG. 10. Accordingly, the detailed explanation for thestructure and function of the ventilating system according to the secondembodiment of the present invention will be omitted.

As described above, the ventilating system according to the presentinvention has the following advantages.

In the ventilating system according to the present invention, it ispossible to perform two functions of circulating the indoor air and thepurifying the indoor air with one unit, thereby decreasing the cost inpurchasing the device of ventilating and purifying the air.

Also, the air-supplying duct and the air-discharging duct are connectedto one side of the case, so that it is possible to lower a height of theventilating system at a degree corresponding to a height in each duct.Also, one end of the case is buried in the ceiling of the room, and theother end of the case is projected toward the room space. In this sate,the air-supplying duct and the air-discharging duct are in directconnection with the case under the ceiling. As a result, there is norequirement for obtaining a large space between the ceiling and thebottom of the upper story. That is, it is possible to decrease thedistance between the ceiling and the bottom of the upper story, therebydecreasing the initial cost in constructing the building. Also, thenumber of stories increases, for improvement of the spatial efficiency.

Also, each duct may be connected with one side from the two sides of thecase. Thus, each duct may be selectively connected with one side of thetwo sides of the case, in due consideration of the structure of outerwalls for installing the ventilating system.

Furthermore, the filter member is provided in the case, so that thepurified clean outdoor air and indoor air is provided to the room space,thereby obtaining the more comfortable room environment.

In addition, the cross flow fan is provided to forcibly inhale theindoor air and the outdoor air, so that it is possible to prevent thedecrease in the air supplying amount, generated by the increase in theloss of pressure, even in case of the high-performance dust-collectingfilter is provided in the filter member.

It will be apparent to those skilled in the art that variousmodifications and variations can be made in the present inventionwithout departing from the spirit or scope of the inventions. Thus, itis intended that the present invention covers the modifications andvariations of this invention provided they come within the scope of theappended claims and their equivalents.

1. A ventilating system comprising: a case having one end buried in aceiling of a room, and the other end projected toward the inside of theroom; an air-supplying passage of communicating the outside of the room,the case, and the inside of the room with one another, to supply anoutdoor air to the inside of the room; an air-discharging passage ofcommunicating the inside of the room, the case, and the outside of theroom with one another, to discharge an indoor air to the outside of theroom; an air-circulating passage of communicating the inside of the roomwith one point of the air-supplying passage inside the case, tointroduce the indoor air to the case, and to re-supply the air to theinside of the room; and a fan provided in the case, for supplying theoutdoor air introduced to the case through the air-supplying passage tothe inside of the room, or re-supplying the indoor air introduced to thecase through the air-circulating passage to the inside of the room. 2.The ventilating system as claimed in claim 1, wherein the case is formedin a flat-quadrant shape, for being positioned at a corner of theceiling in the room.
 3. The ventilating system as claimed in claim 1,wherein the case has two sides being adhered to the corner of a wall inthe room.
 4. The ventilating system as claimed in claim 1, wherein thecase is formed in a flat-quadrate shape, and one side of the case ispositioned adjacent to the wall of the room.
 5. The ventilating systemas claimed in claim 1, wherein the case has a round frontal side forsupplying the indoor air or the outdoor air introduced to the inside ofthe case to the inside of the room.
 6. The ventilating system as claimedin claim 1, further comprising a louver provided in the air-circulatingpassage, for opening and closing the air-circulating passage.
 7. Theventilating system as claimed in claim 1, further comprising a preheatexchanger provided at an intersection between an air-supplying duct andan air-discharging duct, for indirect heat-exchange of the outdoor airsupplied to the inside of the room and the indoor air discharged to theoutside of the room.
 8. The ventilating system as claimed in claim 1,wherein the fan inhales the air at an axis direction, and thendischarges the air at a radius direction.
 9. The ventilating system asclaimed in claim 1, further comprising a damper provided in theair-supplying passage, for opening and closing the air-supplyingpassage.
 10. The ventilating system as claimed in claim 1, wherein theair-supplying passage includes: a first port provided in the side of thecase; an air-supplying duct connected with the first port, and being incommunication with the outside of the room by penetrating the wall; andan air-discharging hole provided in the front of the case.
 11. Theventilating system as claimed in claim 10, wherein the air-dischargingholes are formed at both sides adjacent to the front side of the case.12. The ventilating system as claimed in claim 10, wherein the firstport is provided at a lower portion in the side of the case under theceiling of the room.
 13. The ventilating system as claimed in claim 10,wherein the air-supplying passage further includes a guide passageslantingly provided from an inner upper portion of the case to theair-discharging hole.
 14. The ventilating system as claimed in claim 1,wherein the air-discharging passage includes: a second inlet provided onthe bottom of the case; a second port provided in the side of the case;and an air-discharging duct connected with the second port and being incommunication with the outside of the room by penetrating the wall. 15.The ventilating system as claimed in claim 14, wherein the second portis provided at a lower portion in the side of the case under the ceilingof the room.
 16. The ventilating system as claimed in claim 1, whereinthe air-circulating passage includes: a first inlet provided on thebottom of the case; and an air-discharging hole provided in the front ofthe case.
 17. The ventilating system as claimed in claim 16, wherein theair-discharging holes are formed at both sides adjacent to the frontside of the case.
 18. The ventilating system as claimed in claim 1,wherein the case includes a division plate for dividing the inner spaceof the case into a lower space and an upper space, and an openingprovided in the division plate to communicate the lower space of thecase with the upper space of the case, and the fan is provided to inhalethe air from the lower space of the case and to discharge the inhaledair to the upper space of the case.
 19. The ventilating system asclaimed in claim 1, wherein the air-supplying passage and theair-discharging passage pass through the case under the ceiling of theroom by penetrating the wall of the room.
 20. The ventilating system asclaimed in claim 1, wherein the case includes an air guide, forseparating the air-supplying passage from the air-discharging passage.21. The ventilating system as claimed in claim 1, further comprising afilter member provided in the case, for purifying the indoor air or theoutdoor air introduced to the case.
 22. The ventilating system asclaimed in claim 21, wherein the filter member includes a dust-colletingfilter, photo-catalyst, and active carbon, which are provided in thecase.
 23. The ventilating system as claimed in claim 21, wherein thefilter member is formed of an HEPA (High Efficiency ParticulateArrestor) filter which can remove particles and bacteria, larger than0.3 micron.
 24. The ventilating system as claimed in claim 21, whereinthe filter member is formed of a ULPA (Ultra Low Penetration Absolute)filter which can remove particles and bacteria, with a size ranging0.01˜0.1 micron.
 25. A ventilating system comprising: a case having oneend buried in a ceiling of a room, and the other end projected towardthe inside of the room, the case including a first inlet for inhaling anindoor air re-supplied to the inside of the room, a second inlet forinhaling the indoor air discharged to the outside of the room, and anair-discharging hole for discharging the air introduced to the inside ofthe case to the inside of the room; an air-supplying duct connected withthe case under the ceiling after penetrating a wall, and being incommunication with the outside of the room, for introducing an outdoorair to the case; an air-discharging duct connected with the case underthe ceiling after penetrating the wall, and being in communication withthe outside of the room, for discharging the indoor air introduced tothe case to the outside of the room; an air guide provided in the case,to provide the air-supplying duct being in communication with theair-discharging hole and the first inlet, and to provide theair-discharging duct being in communication with the second inlet; and afan provided in the case, at a communication point of the air-supplyingduct and the air-discharging hole/the first inlet.
 26. The ventilatingsystem as claimed in claim 25, wherein the case is formed in aflat-quadrant shape, for being positioned at a corner of the ceiling inthe room.
 27. The ventilating system as claimed in claim 25, wherein thefirst inlet and the second inlet are provided on the bottom of the case,and the air-discharging hole is provided in the front of the case. 28.The ventilating system as claimed in claim 25, wherein the air guideguides the air introduced to the inside of the case through theair-supplying duct or the first inlet toward the air-discharging hole,and guides the air introduced to the inside of the case through thesecond inlet toward the air-discharging duct.
 29. The ventilating systemas claimed in claim 25, wherein the fan supplies the outdoor airintroduced to the case through the air-supplying duct to the inside ofthe room, or re-supplies the indoor air introduced to the case throughthe first inlet to the inside of the room.
 30. The ventilating system asclaimed in claim 25, further comprising a filter member provided in thecase, for purifying the indoor air or the outdoor air supplied to thecase.
 31. The ventilating system as claimed in claim 25, wherein thecase includes a guide passage slantingly provided from an inner upperportion of the case to the air-discharging hole.
 32. A ventilatingsystem comprising: a case having one side being adjacent to a wall of aroom, one end projected toward the inside of the room, and the other endburied in a ceiling of the room, the case including a first inlet forinhaling an indoor air re-supplied to the inside of the room, a secondinlet for inhaling the indoor air discharged to the outside of the room,and a plurality of air-discharging holes for discharging the airintroduced to the inside of the case to the inside of the room; anair-supplying duct connected with one side of the case under the ceilingafter penetrating the wall of the room, and being in communication withthe outside of the room, for introducing an outdoor air to the case; anair-discharging duct connected with one side of the case under theceiling after penetrating the wall of the room, and being incommunication with the outside of the room, for discharging the indoorair introduced to the case to the outside of the room; an air guideprovided in the case, to provide the air-supplying duct being incommunication with the air-discharging hole and the first inlet, and toprovide the air-discharging duct being in communication with the secondinlet; and a fan provided in the case, at a communication point of theair-supplying duct and the air-discharging hole/the first inlet.
 33. Theventilating system as claimed in claim 32, wherein the case is formed ina flat-quadrate shape, and one side of the case is positioned adjacentto the wall of the room.
 34. The ventilating system as claimed in claim32, wherein the first inlet and the second inlet are provided on thebottom of the case, and the air-discharging holes are provided in thefront of the case and at both sides adjacent to the front of the case.35. The ventilating system as claimed in claim 32, wherein the caseincludes a guide passage slantingly provided from an inner upper portionof the case to the air-discharging hole.
 36. The ventilating system asclaimed in claim 32, wherein the case includes a damper provided atleast any one of the air-discharging holes, for opening and closing theair-discharging hole.
 37. The ventilating system as claimed in claim 36,wherein the damper is provided to open and close any one of theair-discharging holes when any one of the air-discharging holes isprovided close to the wall of the room by installing the case at acorner of the ceiling of the room.
 38. The ventilating system as claimedin claim 32, wherein the air guide guides the air introduced to the casethrough the first inlet toward the air-discharging hole, and guides theair introduced to the case through the second inlet toward theair-discharging duct.
 39. The ventilating system as claimed in claim 32,further comprising a filter member provided in the case, for purifyingthe indoor air or the outdoor air introduced to the case.